Which test should I run using SPSS ?

#1
Question:

Which (in) accuracy is the waist circumference (LEO) of a grown man be predicted based on its fat (VETP)?

Which (in) accuracy of the waist circumference (LEO) of a mature man can be predicted based on the total energy consumption (EAVT)?

--> Perform these analyzes for both (a) adult men younger than 36 and (b) adult men aged 36 or older.


SPSS:

I selected the cases by age and sex (data --> select cases --> 'if' sex*gender )

I tested it by using lineair regression
analyse --> regression --> lineair (independent: LEO , dependent: VETP)

Can someone please tell me if I used the right test? :)

thanks a lot!